CN111234511A - Modified polyurethane foamed plastic - Google Patents

Modified polyurethane foamed plastic Download PDF

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CN111234511A
CN111234511A CN202010144892.8A CN202010144892A CN111234511A CN 111234511 A CN111234511 A CN 111234511A CN 202010144892 A CN202010144892 A CN 202010144892A CN 111234511 A CN111234511 A CN 111234511A
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modified polyurethane
rotating shaft
parts
telescopic rod
foamed plastic
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吕倩晔
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
    • C08J9/141—Hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0006—Controlling or regulating processes
    • B01J19/0013—Controlling the temperature of the process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/18—Stationary reactors having moving elements inside
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00051—Controlling the temperature
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/18—Binary blends of expanding agents
    • C08J2203/184—Binary blends of expanding agents of chemical foaming agent and physical blowing agent, e.g. azodicarbonamide and fluorocarbon
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes
    • C08J2375/08—Polyurethanes from polyethers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2427/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2427/06—Homopolymers or copolymers of vinyl chloride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/06—Elements
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/22—Expanded, porous or hollow particles
    • C08K7/24—Expanded, porous or hollow particles inorganic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/141—Feedstock

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

The invention belongs to the technical field of polyurethane modification, and particularly relates to a modified polyurethane foamed plastic which comprises the following raw materials in parts by mass: 20-30 parts of isocyanate, 21-27 parts of polyether polyol, 0.6-1.3 parts of foaming agent, 0.3-0.7 part of hydroquinone-bis (p-light ethyl) ether, 3-7 parts of modified carbon fiber, 1-1.5 parts of inorganic hollow microsphere, 0.1-0.2 part of compound containing formic ester structure, 7-9 parts of epoxy resin and 10-16 parts of nano-scale polyvinyl chloride powder, wherein the generator comprises a shell, a reaction barrel and a motor; an elastic belt is fixedly connected between one end of the telescopic rod, which is far away from the rotating shaft, and the rotating shaft; the invention can ensure uniform cell density, simultaneously prevent overlarge cells and excessive carbamido from influencing the compressive strength of the modified polyurethane foamed plastic, thereby effectively improving the compressive strength and toughness of the modified polyurethane foamed plastic, simultaneously preventing the modified polyurethane foamed plastic from adhering to a generator to cause waste of the modified polyurethane foamed plastic, and facilitating the cleaning and reuse of the generator.

Description

Modified polyurethane foamed plastic
Technical Field
The invention belongs to the technical field of polyurethane modification, and particularly relates to modified polyurethane foamed plastic.
Background
Polyurethane (polyurethane) is a short name for polyurethane, and is a general name for a class of polymers having a repeat-NHCOO-group on the main chain, which are prepared by reacting a polyol and a polyisocyanate. Depending on the number of functional groups of the starting material, a high molecular weight polymer having a linear structure or a three-dimensional structure can be produced. The properties are different due to the different structure of the polymers. By utilizing the property, the polyurethane polymer can be made into polyurethane products with various performances and types from liquid to solid, from soft to hard coating, adhesive, plastic, fiber, rubber and the like.
The polyurethane material is the heat insulation material with the best performance internationally at present, and has excellent oil resistance, toughness, wear resistance, aging resistance and adhesiveness because the polyurethane material contains extremely strong carbamate groups and is insoluble in nonpolar groups.
The polyurethane foamed plastic is a better raw material, is a foamed product prepared from polyether polyol and isocyanate under the action of a foaming agent, has excellent heat insulation performance, mechanical property, electrical property, acoustic property, chemical resistance and the like, and is widely applied to the fields of refrigerators, freezers, building energy conservation, sofas, mattresses, shoe materials, high-grade furniture and the like.
The introduction of polyurethane can be seen in journal of polyurethane industry, but in the prior art, adjacent cells are very easy to combine to generate large cells in the production process of the modified polyurethane foamed plastic, greatly influences the compression resistance and the toughness of the modified polyurethane foamed plastic, leads the finished product of the modified polyurethane foamed plastic to have crisp texture, influences the application range of the modified polyurethane foamed plastic, meanwhile, in the prior art, the regular degree of the foam holes and the density of the foam holes can not be well controlled in the production process of the modified polyurethane foam plastic, so that the problems of low production efficiency and poor qualification rate of the modified polyurethane foam plastic are caused, meanwhile, in the modified production process of the modified polyurethane foamed plastic, the modified polyurethane foamed plastic is pasty, the polyurethane foaming plastic has enhanced viscosity, is very easy to adhere to production equipment, and is easy to cause waste of the modified polyurethane foaming plastic while inconvenient to clean.
In view of this, in order to overcome the above technical problems, the present inventors have designed and developed a modified polyurethane foam, and only have made a generator dedicated for producing the modified polyurethane foam, so as to solve the above technical problems.
Disclosure of Invention
The invention provides a modified polyurethane foamed plastic, which aims to make up the defects of the prior art, solve the problems that the diameter of cells, the regularity of the cells and the density of the cells cannot be well controlled in the production process of the modified polyurethane foamed plastic, the compression resistance and the toughness of the modified polyurethane foamed plastic are greatly influenced, the finished product of the modified polyurethane foamed plastic is fragile, and the application range of the modified polyurethane foamed plastic is influenced.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a modified polyurethane foamed plastic which comprises the following raw materials in parts by mass: 20-30 parts of isocyanate, 21-27 parts of polyether polyol, 0.6-1.3 parts of foaming agent, 0.3-0.7 part of hydroquinone-bis (p-light ethyl) ether, 3-7 parts of modified carbon fiber, 1-1.5 parts of inorganic hollow microsphere, 0.1-0.2 part of compound containing formic ester structure, 7-9 parts of epoxy resin and 10-16 parts of nano polyvinyl chloride powder.
Preferably, the isocyanate is a mixture formed by mixing a main material and an auxiliary material according to a mass ratio of 7: 1.5; the main material is one or more of diphenylmethane diisocyanate, polymethylene polyphenyl polyisocyanate, toluene diisocyanate and dimethyl methylphosphonate; the auxiliary material is hexamethylene diisocyanate.
Preferably, the foaming agent is a mixed solution obtained by mixing n-pentane and deionized water according to the mass ratio of 10:3, and is prepared by mixing the n-pentane and the deionized water according to the mass ratio of 10:3, so that the problems that isocyanate and polyether polyol are easy to react with water in the reaction process when only the deionized water is used as a foaming device to generate more urea groups, the proportion of the isocyanate and the polyether polyol is influenced, and the generated bubbles are brittle and easy to break can be effectively avoided, the compression strength and the bubble distribution uniformity of the modified polyurethane foamed plastic are influenced, and the influence on the density of the bubbles due to overlarge cells when only the n-pentane is used as the foaming agent can be avoided, so that the compression strength and the toughness of the modified polyurethane foamed plastic are influenced, and the uniform density of the cells can be ensured by mixing the n-pentane and the deionized water as the foaming agent, meanwhile, the phenomenon that the compressive strength of the modified polyurethane foamed plastic is affected by overlarge cells and excessive carbamido is generated is prevented, so that the compressive strength and the toughness of the modified polyurethane foamed plastic are effectively improved.
Preferably, the preparation method of the modified polyurethane foaming plastic comprises the following steps:
s1: isocyanate and polyether glycol are simultaneously placed into a reaction barrel of a generator to be stirred and mixed, after the mixing is finished, a foaming agent and a compound containing a formic ester structure are added, the mixture is heated to 120-135 ℃, the pressure value is 1.3-1.8mpa, the mixing time is 1-3 hours, a primary modified plastic is obtained, the compound containing the formic ester structure is added into the reaction barrel of the generator, the compound containing the formic ester structure and the compound containing the formic ester structure can react with carbamido generated by the foaming agent to generate allophanate, the allophanate can further modify polyurethane resin to obtain a novel compound with olefinic bond, the compound is polyurethane resin obtained by the reaction of polyisocyanate and hydroxyl functionalized olefin compound, the durability and the abrasion resistance of the modified polyurethane foamed plastic can be effectively improved, and the influence of carbamido on the modified polyurethane foamed plastic can be avoided, the purpose of changing waste into valuable is achieved;
s2: hydroquinone-bis (p-light ethyl) ether, epoxy resin and nano-scale polyvinyl chloride powder are sequentially added into the primary modified plastic obtained in a reaction barrel of a generator in the S1, stirring is carried out for 3-4 hours, the temperature is controlled to be 60-90 ℃ in the process of the first two thirds of the time of stirring, the pressure value is 1-1.2mpa, and the hydroquinone-bis (p-light ethyl) ether is taken as a chain extender, so that the molecular bond content of polyurethane can be effectively improved, the molecular weight of the polyurethane is improved, the compressive strength and toughness of the modified polyurethane foamed plastic are further improved, and meanwhile, the nano-scale polyvinyl chloride powder is added, so that the cells of the modified polyurethane foamed plastic are more uniform and the shape of the modified polyurethane foamed plastic is more regular, and the compressive strength and toughness of the modified polyurethane foamed plastic are further improved;
s3: when the stirring time in the S2 is carried out for two thirds, modified carbon fiber and inorganic hollow microspheres are sequentially added into a reaction barrel of a generator, the temperature is raised to 310 ℃ according to the temperature rise rate of 10 ℃ per minute after the modified carbon fiber and the inorganic hollow microspheres are added, the pressure is kept unchanged, the temperature is kept for 1-2 hours after the temperature is raised, the modified polyurethane foamed plastic is obtained, the carbon fiber has higher toughness, the surface energy is obviously reduced after the carbon fiber is modified by a proper coupling agent, the crosslinking performance and the dispersibility between the carbon fiber and other materials are good, can obviously improve the physical toughness, heat-resistant stability and mechanical property of the product, and improves the activity of the modified carbon fiber through temperature rise and heat preservation reaction, thereby improving the contact probability with other materials and exerting the functions of improving the physical toughness, the heat-resistant stability and the mechanical property of the product by the modified carbon fiber to the maximum extent;
s4: and taking out the reaction barrel of the generator, pouring the reaction barrel into a mold, and pouring to obtain a finished product made of the modified polyurethane foamed plastic.
Preferably, the generator comprises a shell, a reaction barrel and a motor; the shell is of a barrel-shaped structure; a sealing cover is covered above the shell; the motor is fixedly connected to the upper surface of the sealing cover, and a driving shaft of the motor penetrates through the sealing cover and is fixedly connected with a rotating shaft below the sealing cover; a rubber pad is arranged on the periphery of the lower surface of the sealing cover, which is in contact with the shell; the upper surface of the sealing cover is rotatably connected with bolts which are uniformly arranged on the circumference; the bolt is positioned above the rubber pad; threaded holes which are uniformly distributed are formed in the contact position of the shell and the sealing cover, and the threaded holes and the bolts are arranged in a one-to-one correspondence manner; the reaction barrel is positioned in the shell and is in contact with the inner wall of the shell; the upper surface of the reaction barrel is provided with a trapezoidal groove; a cover plate is arranged in the trapezoidal groove; the middle part of the cover plate is provided with a through hole; the rotating shaft penetrates into the reaction barrel through the penetrating hole; the shell and the reaction barrel are both provided with a charging hole, the two charging holes are communicated with each other in the working process of the generator, and a rubber plug is plugged in the charging holes; the lower end of the rotating shaft is provided with an extrusion groove; an extrusion shaft is connected in the extrusion groove in a sliding manner; an air bag is fixedly connected between the extrusion shaft and the bottom of the extrusion groove; part of the surface of the rotating shaft below the cover plate is provided with uniformly arranged stirring grooves; the air bag is communicated with the stirring tank; the stirring tank is internally and slidably connected with a telescopic rod; the outer wall of the telescopic rod is designed to be tightly attached to the stirring tank; the stirring tank is designed in a right-angled triangle manner, so that the inclined direction of the telescopic rod faces to the rotating direction of the rotating shaft; a spring is fixedly connected between the telescopic rod and the stirring tank, and the telescopic rod can be pulled back into the stirring tank through the spring in the process of loosening the air bag; when the device works, isocyanate and polyether glycol are simultaneously placed into a reaction barrel of a generator in an initial state, the reaction barrel is placed into a shell, a cover plate is placed into a trapezoidal groove of the reaction barrel, a sealing cover is placed on the shell, a rotating shaft penetrates through a penetrating hole in the placing process, an extrusion shaft contacts the bottom of the reaction barrel in the process that the rotating shaft penetrates through the cover plate, the extrusion shaft slides upwards in the extrusion groove to extrude an air bag, gas in the air bag enters a stirring groove to stretch out a telescopic rod, the motor is started after the sealing cover is fixed on the shell through a bolt, the motor drives the rotating shaft to rotate so as to drive the telescopic rod to circularly move by taking the rotating shaft as the circle center, the raw materials can be disturbed in the rotating process of the rotating shaft through the triangular design of the telescopic rod, the raw materials are fully stirred and mixed, and foaming agent, hydroquinone-bis (p, Modified carbon fiber, inorganic hollow microsphere, compound containing formate structure, epoxy resin and nano-scale polyvinyl chloride powder are added into a reaction barrel through a charging opening, after stirring and mixing are completed, the modified polyurethane foamed plastic is pasty under the common modification of foaming agent, modified carbon fiber, inorganic hollow microsphere, compound containing formate structure and nano-scale polyvinyl chloride powder, and has strong adhesion property, so that the modified polyurethane foamed plastic is adhered inside a reactor, after the reaction is completed, the bolt is loosened, the sealing cover is vertically pulled upwards through manual or mechanical action, the rotating shaft is moved upwards in the pulling process of the sealing cover, the extruding shaft slides downwards in the extruding groove under the action of gravity, the air bag is loosened, the air in the stirring groove newly enters the air bag, the telescopic rod is contracted into the stirring groove under the action of the tensile force of the spring, and the rotating shaft is pulled out through the penetrating hole, in-process in the telescopic link retraction agitator tank, can effectively scrape the modified polyurethane expanded plastics of telescopic link surface adhesion, thereby avoid modified polyurethane expanded plastics's waste, the increase of utilization rate, extract the in-process of wearing the hole in the pivot simultaneously, can effectively scrape the modified polyurethane expanded plastics of pivot surface adhesion through wearing the hole, thereby further prevent modified polyurethane expanded plastics's waste, the increase of utilization rate, and reduction in production cost, and after pivot and telescopic link surface modified polyurethane expanded plastics scrape, wash comparatively convenient and fast, manpower and materials are saved, thereby further improve modified polyurethane expanded plastics's production efficiency.
Preferably, an elastic belt is fixedly connected between one end of the telescopic rod, which is far away from the rotating shaft, and the rotating shaft; the connecting point of the elastic belt and the rotating shaft is positioned above the connecting point of the corresponding telescopic rod and the rotating shaft, namely the elastic belt is positioned above the corresponding telescopic rod, so that the elastic belt, the rotating shaft and the corresponding telescopic rod form a right-angled triangle structure; during operation, the viscosity of the modified polyurethane foaming plastic in the modification process is stronger, the resistance borne by the telescopic rod is larger, the telescopic rod is of a hollow structure, the strength is poorer, the structural strength of the telescopic rod can be enhanced by the elastic belt, the rotating shaft and the corresponding telescopic rod form a right-angled triangle structure, so that the telescopic rod is prevented from being broken in the working process, the service life of the generator is prolonged, meanwhile, the elasticity of the elastic belt drives the elastic belt to circularly move around the rotating shaft by taking the rotating shaft as the circle center in the rotating process of the rotating shaft driving the telescopic rod to rotate, the mixing degree of the modified polyurethane foaming plastic can be further improved by the rotating stirring of the elastic belt, the production efficiency is improved, and because the telescopic rod is of a triangular structural design, raw materials impact the surface of the elastic belt by the raw materials in the rotating process, so that the elastic belt vibrates while rotating, the mixing effect of the, the phenomenon that the rotating shaft cannot be pulled out of the penetrating hole due to the fact that the telescopic rod cannot be retracted by the tensile force of the spring after the too much modified polyurethane foamed plastic is adhered to the surface of the telescopic rod is prevented.
Preferably, the cover plate is internally provided with sliding chutes which are uniformly distributed; the sliding groove is designed in a cross shape; a clamping rod is connected in the sliding groove in a sliding manner; one end of the clamping rod penetrates into the penetrating hole, and the upper surface of one end of the clamping rod in the penetrating hole is inclined; the other end of the clamping rod penetrates through the sliding groove; the surface of the trapezoidal groove is provided with clamping grooves which are uniformly distributed; the clamping grooves and the sliding grooves are designed in a one-to-one correspondence mode, and one ends, close to the clamping grooves, of the clamping rods penetrate into the clamping grooves after the rotating shafts penetrate into the penetrating holes; a spring is fixedly connected between the clamping rod and the sliding groove; during operation, the pivot inserts and penetrates the hole in-process, because the card pole is in penetrating downthehole one end upper surface slope design, make the card pole to keeping away from the pivot direction slip, thereby make the card pole keep away from the one end of pivot and insert in corresponding draw-in groove, realize the fixed of apron, prevent to hug closely the pivot surface owing to penetrating the hole inner wall, it rotates the in-process at the pivot and drive the apron and rotate, lead to the apron to slide from top to bottom, strike the closing plate, cause the pivot to rotate in-process shake simultaneously, prevent simultaneously that sealed lid from taking out in-process pivot from driving the apron and shift up, lead to the apron can't scrape the modified polyurethane expanded plastics on the pivot surface, and after modified polyurethane expanded plastics complete modification is accomplished, along with the pivot is extracted and is penetrated the hole, the card pole breaks away from the draw-in groove under the pulling force of spring, can realize taking out of apron, thereby make modified polyurethane expanded plastics pour Slowly, the modified polyurethane foaming plastic is dehydrated and dried, so that the modified polyurethane foaming plastic misses the optimal pouring time, the production efficiency of the modified polyurethane foaming plastic is improved, the cover plate is matched with the sealing plate to realize double-layer sealing on the reaction barrel, and the sealing effect of the reaction barrel is improved.
The invention has the following beneficial effects:
1. according to the modified polyurethane foamed plastic, the foaming agent is prepared by mixing n-pentane and deionized water in a ratio, so that the uniform cell density can be ensured, and the influence of too large cells and too much urea groups on the compressive strength of the modified polyurethane foamed plastic can be prevented, so that the compressive strength and the toughness of the modified polyurethane foamed plastic are effectively improved.
2. According to the modified polyurethane foamed plastic, the compound containing the formate structure is added into a reaction barrel of the generator, and reacts with the compound containing the formate structure to generate allophanate, the allophanate can further modify polyurethane resin to obtain a novel compound with olefinic bond, the compound is the polyurethane resin obtained by reacting polyisocyanate and hydroxyl functional olefin compound, the durability and the abrasion resistance of the modified polyurethane foamed plastic can be effectively improved, the influence of the carbamide on the modified polyurethane foamed plastic is avoided, and the purpose of changing waste into valuable is achieved.
3. According to the modified polyurethane foamed plastic, the hydroquinone-bis (p-light ethyl) ether is arranged, so that the molecular bond content of polyurethane can be effectively improved, the molecular weight of the polyurethane is improved, the compressive strength and the toughness of the modified polyurethane foamed plastic are further improved, and meanwhile, the nano-grade polyvinyl chloride powder is added, so that the cells of the modified polyurethane foamed plastic are more uniform and the shape of the cells of the modified polyurethane foamed plastic is more regular, and the compressive strength and the toughness of the modified polyurethane foamed plastic are further improved.
4. According to the modified polyurethane foamed plastic, the generator is arranged, and after the production of the modified polyurethane foamed plastic is finished, the generator is used for preventing the modified polyurethane foamed plastic from being adhered to the generator, so that the waste of the modified polyurethane foamed plastic is caused, and the generator is convenient to clean and reuse, so that manpower and material resources are saved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a cross-sectional view of the generator;
FIG. 3 is a perspective view of the telescoping pole;
in the figure: the device comprises a shell 1, a sealing cover 11, a rotating shaft 12, a bolt 13, a cover plate 14, a penetrating hole 15, a charging hole 16, an extrusion groove 17, an extrusion shaft 18, an air bag 19, a reaction barrel 2, a trapezoidal groove 21, a stirring groove 3, an expansion link 31, an elastic belt 32, a sliding groove 4, a clamping rod 41 and a clamping groove 42.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to fig. 3, the modified polyurethane foamed plastic of the present invention comprises the following raw materials by mass: 20-30 parts of isocyanate, 21-27 parts of polyether polyol, 0.6-1.3 parts of foaming agent, 0.3-0.7 part of hydroquinone-bis (p-light ethyl) ether, 3-7 parts of modified carbon fiber, 1-1.5 parts of inorganic hollow microsphere, 0.1-0.2 part of compound containing formic ester structure, 7-9 parts of epoxy resin and 10-16 parts of nano polyvinyl chloride powder.
In one embodiment of the invention, the isocyanate is a mixture of a main material and an auxiliary material which are mixed according to a mass ratio of 7: 1.5; the main material is one or more of diphenylmethane diisocyanate, polymethylene polyphenyl polyisocyanate, toluene diisocyanate and dimethyl methylphosphonate; the auxiliary material is hexamethylene diisocyanate.
As an implementation mode of the invention, the foaming agent is a mixed solution obtained by mixing n-pentane and deionized water according to a mass ratio of 10:3, and the foaming agent is prepared by mixing n-pentane and deionized water according to a mass ratio of 10:3, so that the problems that isocyanate and polyether polyol are easy to react with water in a reaction process when only deionized water is used as a foaming device to generate more urea groups, the ratio of isocyanate and polyether polyol is influenced, the generated bubbles are brittle and easy to break are effectively solved, the compressive strength and the bubble distribution uniformity of the modified polyurethane foamed plastic are influenced, the phenomenon that the density of the bubbles is influenced due to overlarge bubbles when only n-pentane is used as the foaming agent is avoided, the compressive strength and the toughness of the modified polyurethane foamed plastic are influenced, the uniform density of the bubbles can be ensured by mixing n-pentane and deionized water as the foaming agent, meanwhile, the phenomenon that the compressive strength of the modified polyurethane foamed plastic is affected by overlarge cells and excessive carbamido is generated is prevented, so that the compressive strength and the toughness of the modified polyurethane foamed plastic are effectively improved.
As an embodiment of the invention, the preparation method of the modified polyurethane foamed plastic comprises the following steps:
s1: isocyanate and polyether glycol are simultaneously placed into a reaction barrel 2 of a generator to be stirred and mixed, after the mixing is finished, a foaming agent and a compound containing a formic ester structure are added, the mixture is heated to 120-135 ℃, the pressure value is 1.3-1.8mpa, the mixing time is 1-3 hours, a primary modified plastic is obtained, a compound containing a formic ester structure is added into the reaction barrel 2 of the generator, the compound containing the formic ester structure and the compound containing the formic ester structure can react with carbamido generated by the foaming agent to generate allophanate, the allophanate can further modify polyurethane resin to obtain a novel compound with olefinic bond, the compound is polyurethane resin obtained by reacting polyisocyanate and hydroxyl functionalized olefin compound, the durability and the abrasion resistance of the modified polyurethane foamed plastic can be effectively improved, and the influence of carbamido on the modified polyurethane foamed plastic can be avoided, the purpose of changing waste into valuable is achieved;
s2: hydroquinone-bis (p-light ethyl) ether, epoxy resin and nano-scale polyvinyl chloride powder are sequentially added into the primary modified plastic obtained in a reaction barrel 2 of a generator in S1, stirring is carried out for 3-4 hours, the temperature is controlled to be 60-90 ℃ in the process of the first two thirds of the time of stirring, the pressure value is 1-1.2mpa, and the hydroquinone-bis (p-light ethyl) ether is taken as a chain extender, so that the molecular bond content of polyurethane can be effectively improved, the molecular weight of the polyurethane is improved, the compressive strength and toughness of the modified polyurethane foamed plastic are further improved, and meanwhile, the nano-scale polyvinyl chloride powder is added, so that the cells of the modified polyurethane foamed plastic are more uniform and the shape of the modified polyurethane foamed plastic is more regular, and the compressive strength and toughness of the modified polyurethane foamed plastic are further improved;
s3: when the stirring time in the S2 is carried out for two thirds, modified carbon fiber and inorganic hollow microspheres are sequentially added into a reaction barrel 2 of a generator, the temperature is raised to 310 ℃ according to the temperature rise rate of 10 ℃ per minute after the modified carbon fiber and the inorganic hollow microspheres are added, the pressure is kept unchanged, the temperature is kept for 1-2 hours after the temperature is raised, the modified polyurethane foamed plastic is obtained, the carbon fiber has higher toughness, the surface energy is obviously reduced after the carbon fiber is modified by a proper coupling agent, the crosslinking performance and the dispersibility between the carbon fiber and other materials are good, can obviously improve the physical toughness, heat-resistant stability and mechanical property of the product, and improves the activity of the modified carbon fiber through temperature rise and heat preservation reaction, thereby improving the contact probability with other materials and exerting the functions of improving the physical toughness, the heat-resistant stability and the mechanical property of the product by the modified carbon fiber to the maximum extent;
s4: and taking out the reaction barrel 2 of the generator, pouring the reaction barrel into a mold, and pouring to obtain a finished product made of the modified polyurethane foaming plastic.
Reaction of a polyisocyanate with a polyol to give a polyurethane:
Figure RE-GDA0002452454030000071
isocyanate reacts with water, compounds or building blocks bearing isocyanate groups first form unstable carbamates with water and then decompose into amines and carbon dioxide:
Figure RE-GDA0002452454030000072
the amine groups are further reacted with isocyanate groups to give urea group-containing polymers:
Figure RE-GDA0002452454030000081
the urethane reaction, the hydrogen on the nitrogen atom of the carbamate group reacts with the isocyanate to form allophanate:
Figure RE-GDA0002452454030000082
as an embodiment of the present invention, the generator includes a housing 1, a reaction tub 2, and a motor; the shell 1 is of a barrel-shaped structure; a sealing cover 11 is covered above the shell 1; the motor is fixedly connected to the upper surface of the sealing cover 11, and a driving shaft of the motor penetrates through the sealing cover 11 and is fixedly connected with a rotating shaft 12 below the sealing cover 11; a rubber pad is arranged on the periphery of the lower surface of the sealing cover 11, which is in contact with the shell 1; the upper surface of the sealing cover 11 is rotatably connected with bolts 13 which are uniformly distributed on the circumference; the bolt 13 is positioned above the rubber pad; threaded holes which are uniformly distributed are formed in the contact position of the shell 1 and the sealing cover 11, and the threaded holes and the bolts 13 are arranged in a one-to-one correspondence manner; the reaction barrel 2 is positioned in the shell 1 and is in contact with the inner wall of the shell 1; the upper surface of the reaction barrel 2 is provided with a trapezoidal groove 21; a cover plate 14 is arranged in the trapezoidal groove 21; the middle part of the cover plate 14 is provided with a through hole 15; the rotating shaft 12 penetrates into the reaction barrel 2 through the penetrating hole 15; the shell 1 and the reaction barrel 2 are both provided with a feed inlet 16, the two feed inlets 16 are communicated with each other in the working process of the generator, and rubber plugs are plugged in the feed inlets; the lower end of the rotating shaft 12 is provided with an extrusion groove 17; a squeezing shaft 18 is connected in the squeezing groove 17 in a sliding manner; an air bag 19 is fixedly connected between the extrusion shaft 18 and the bottom of the extrusion groove 17; the part of the surface of the rotating shaft 12 below the cover plate 14 is provided with uniformly arranged stirring grooves 3; the air bag 19 is communicated with the stirring tank 3; the stirring tank 3 is internally and slidably connected with a telescopic rod 31; the outer wall of the telescopic rod 31 is designed to be tightly attached to the stirring tank 3; the stirring tank 3 is designed into a right triangle, so that the inclined direction of the telescopic rod 31 faces the rotating direction of the rotating shaft 12; a spring is fixedly connected between the telescopic rod 31 and the stirring tank 3, and the telescopic rod 31 can be pulled back into the stirring tank 3 through the spring in the process of loosening the air bag 19; when the device works, isocyanate and polyether glycol are simultaneously placed into a reaction barrel 2 of a generator in an initial state, the reaction barrel 2 is placed into a shell 1, a cover plate 14 is placed into a trapezoidal groove 21 of the reaction barrel 2, a sealing cover 11 is placed on the shell 1, a rotating shaft 12 penetrates through the cover plate 14 through a penetrating hole 15 in the placing process, an extruding shaft 18 contacts the bottom of the reaction barrel 2 in the process that the rotating shaft 12 penetrates through the cover plate 14, the extruding shaft 18 slides upwards in an extruding groove 17 to extrude an air bag 19, gas in the air bag 19 enters a stirring groove 3 to extend out a telescopic rod 31, the motor is started after the sealing cover 11 is fixed on the shell 1 through a bolt 13, the motor drives the rotating shaft 12 to rotate, the telescopic rod 31 is driven to circularly move by taking the rotating shaft 12 as a circle center, through the triangular design of the telescopic rod 31, the raw materials can be disturbed in the rotating process of the rotating shaft 12, and are fully stirred and, the foaming agent, the hydroquinone-bis (p-light ethyl) ether, the modified carbon fiber, the inorganic hollow microsphere, the compound containing a formate structure, the epoxy resin and the nano-scale polyvinyl chloride powder are all added into the reaction barrel 2 through the feed inlet 16, after the stirring and mixing are finished, as the modified polyurethane foamed plastic is pasty under the common modification of the foaming agent, the modified carbon fiber, the inorganic hollow microsphere, the compound containing a formate structure and the nano-scale polyvinyl chloride powder, and has stronger adhesion property, the modified polyurethane foamed plastic is adhered inside the reactor, after the reaction is finished, the bolt 13 is loosened, the sealing cover 11 is vertically pulled upwards through manual or mechanical action, the rotating shaft 12 is moved upwards in the pulling process of the sealing cover 11, the extrusion shaft 18 slides downwards in the extrusion groove 17 under the action of gravity, the air bag 19 is loosened, and the air in the stirring groove 3 is enabled to newly enter the air bag 19, make telescopic link 31 contract into stirred tank 3 under the pulling force effect of spring in, thereby make pivot 12 extract through wearing hole 15, in-process in telescopic link 31 contracts into stirred tank 3, can effectively scrape the modified polyurethane expanded plastics of telescopic link 31 surface adhesion, thereby avoid modified polyurethane expanded plastics's waste, the utilization ratio is improved, simultaneously pull out the in-process of wearing hole 15 in pivot 12, can effectively scrape the modified polyurethane expanded plastics of pivot 12 surface adhesion through wearing hole 15, thereby further prevent modified polyurethane expanded plastics's waste, the utilization ratio is improved, the production cost is reduced, and pivot 12 and telescopic link 31 surface modified polyurethane expanded plastics scrape after, wash comparatively convenient and fast, save manpower and materials, thereby further improve modified polyurethane expanded plastics's production efficiency.
As an embodiment of the present invention, an elastic belt 32 is fixedly connected between one end of the telescopic rod 31 away from the rotating shaft 12 and the rotating shaft 12; the connection point of the elastic belt 32 and the rotating shaft 12 is located above the connection point of the corresponding telescopic rod 31 and the rotating shaft 12, that is, the elastic belt 32 is located above the corresponding telescopic rod 31, so that the elastic belt 32, the rotating shaft 12 and the corresponding telescopic rod 31 form a right-angled triangle structure; during operation, the viscosity of the modified polyurethane foaming plastic in the modification process is stronger, the resistance received by the telescopic rod 31 is larger, the telescopic rod 31 is of a hollow structure, the strength is poorer, the structural strength of the telescopic rod 31 can be enhanced by the elastic belt 32, the rotating shaft 12 and the corresponding telescopic rod 31 form a right triangle structure, so that the telescopic rod 31 is prevented from being broken in the working process, the service life of the generator is prolonged, meanwhile, the elasticity of the elastic belt 32 drives the elastic belt 32 to move circumferentially around the rotating shaft 12 by using the rotating shaft 12 as a circle center in the rotating process of the rotating shaft 12 driving the telescopic rod 31 to rotate, the mixing degree of the modified polyurethane foaming plastic can be further improved by the rotating stirring of the elastic belt 32, so that the production efficiency is improved, and because the telescopic rod 31 is of a triangular structural design, the turbulent flow raw material impacts the surface of the elastic belt 32, the mixing effect of raw materials is further improved, and simultaneously the elastic belt 32 is in a stretching state and can assist the retraction of the telescopic rod 31, so that the phenomenon that the rotating shaft 12 cannot be pulled out of the penetration hole 15 due to the fact that the telescopic rod 31 cannot be retracted by the tensile force of the spring after the excessive modified polyurethane foamed plastic is adhered to the surface of the telescopic rod 31 is prevented.
As an embodiment of the present invention, the cover plate 14 has uniformly arranged sliding grooves 4 formed therein; the sliding groove 4 is in a cross shape; a clamping rod 41 is connected in the sliding groove 4 in a sliding manner; one end of the clamping rod 41 penetrates into the penetrating hole 15, and the upper surface of one end of the clamping rod 41 in the penetrating hole 15 is inclined; the other end of the clamping rod 41 penetrates through the sliding groove 4; the surface of the trapezoidal groove 21 is provided with clamping grooves 42 which are uniformly distributed; the clamping grooves 42 and the sliding grooves 4 are designed in a one-to-one correspondence manner, and one ends of the clamping rods 41 close to the clamping grooves 42 are designed to penetrate into the clamping grooves 42 after the rotating shaft 12 penetrates into the penetrating holes 15; a spring is fixedly connected between the clamping rod 41 and the sliding groove 4; when the improved polyurethane foaming plastic sealing device works, in the process that the rotating shaft 12 is inserted into the penetrating hole 15, because the upper surface of one end of the clamping rod 41 in the penetrating hole 15 is designed in an inclined manner, the clamping rod 41 slides towards the direction far away from the rotating shaft 12, so that the end of the clamping rod 41 far away from the rotating shaft 12 is inserted into the corresponding clamping groove 42, the cover plate 14 is fixed, the situation that the cover plate 14 cannot be scraped off from the surface of the rotating shaft 12 due to the fact that the inner wall of the penetrating hole 15 is tightly attached to the surface of the rotating shaft 12 and the cover plate 14 is driven to rotate in the rotating process of the rotating shaft 12 to slide up and down to impact the sealing plate and cause the rotating shaft 12 to shake in the rotating process is prevented, meanwhile, the cover plate 14 cannot be scraped off from the improved polyurethane foaming plastic on the surface of the rotating shaft 12 due to the fact that the rotating shaft 12 drives the cover plate 14 to, thereby make modified polyurethane expanded plastics pour more smoothly, prevent to pour the bore undersize and lead to modified polyurethane expanded plastics adhesion to lead to modified polyurethane expanded plastics to pour slower, make modified polyurethane expanded plastics dehydration dry, cause modified polyurethane expanded plastics to miss the best pouring time to improve modified polyurethane expanded plastics's production efficiency, and apron 14 cooperates the closing plate to realize double-deck sealed to reaction vessel 2, improves reaction vessel 2's sealed effect.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (7)

1. A modified polyurethane foaming plastic is characterized in that: the composite material comprises the following raw materials in percentage by mass: 20-30 parts of isocyanate, 21-27 parts of polyether polyol, 0.6-1.3 parts of foaming agent, 0.3-0.7 part of hydroquinone-bis (p-light ethyl) ether, 3-7 parts of modified carbon fiber, 1-1.5 parts of inorganic hollow microsphere, 0.1-0.2 part of compound containing formic ester structure, 7-9 parts of epoxy resin and 10-16 parts of nano polyvinyl chloride powder.
2. The modified polyurethane foam plastic as claimed in claim 1, wherein: the isocyanate is a mixture formed by mixing a main material and an auxiliary material according to a mass ratio of 7: 1.5; the main material is one or more of diphenylmethane diisocyanate, polymethylene polyphenyl polyisocyanate, toluene diisocyanate and dimethyl methylphosphonate; the auxiliary material is hexamethylene diisocyanate.
3. The modified polyurethane foam plastic as claimed in claim 1, wherein: the foaming agent is a mixed solution formed by mixing n-pentane and deionized water according to a mass ratio of 10: 3.
4. The modified polyurethane foam plastic as claimed in claim 1, wherein: the preparation method of the modified polyurethane foaming plastic comprises the following steps:
s1: simultaneously putting isocyanate and polyether glycol into a reaction barrel (2) of a generator, stirring and mixing, adding a foaming agent and a compound containing a formic ester structure after mixing is finished, heating to the temperature of 120-135 ℃, wherein the pressure value is 1.3-1.8mpa, and the mixing time is 1-3 hours to obtain primary modified plastic;
s2: sequentially adding hydroquinone-bis (p-light ethyl) ether, epoxy resin and nano polyvinyl chloride powder into the primary modified plastic obtained in the reaction barrel (2) of the generator in the S1, stirring for 3-4 hours, controlling the temperature to be 60-90 ℃ in the process of stirring for the first two thirds of the time, and controlling the pressure value to be 1-1.2 mpa;
s3: when the stirring time in the S2 is two thirds, sequentially adding modified carbon fibers and inorganic hollow microspheres into a reaction barrel (2) of a generator, heating to 300-310 ℃ at a heating rate of 10 ℃ per minute after adding the modified carbon fibers and the inorganic hollow microspheres, keeping the pressure unchanged, and keeping the temperature for 1-2 hours after heating to obtain the modified polyurethane foamed plastic;
s4: and taking out the reaction barrel (2) of the generator, pouring the reaction barrel into a mold, and pouring to obtain a finished product made of the modified polyurethane foamed plastic.
5. The modified polyurethane foam plastic as claimed in claim 4, wherein: the generator comprises a shell (1), a reaction barrel (2) and a motor; the shell (1) is of a barrel-shaped structure; a sealing cover (11) is covered above the shell (1); the motor is fixedly connected to the upper surface of the sealing cover (11), and a driving shaft of the motor penetrates through the sealing cover (11) and is fixedly connected with a rotating shaft (12) below the sealing cover (11); a rubber pad is arranged on the periphery of the lower surface of the sealing cover (11) which is in contact with the shell (1); the upper surface of the sealing cover (11) is rotatably connected with bolts (13) which are uniformly distributed on the circumference; the bolt (13) is positioned above the rubber pad; threaded holes which are uniformly distributed are formed in the contact position of the shell (1) and the sealing cover (11), and the threaded holes and the bolts (13) are arranged in a one-to-one correspondence manner; the reaction barrel (2) is positioned in the shell (1) and is in contact with the inner wall of the shell (1); the upper surface of the reaction barrel (2) is provided with a trapezoidal groove (21); a cover plate (14) is arranged in the trapezoidal groove (21); the middle part of the cover plate (14) is provided with a penetrating hole (15); the rotating shaft (12) penetrates into the reaction barrel (2) through the penetrating hole (15); the shell (1) and the reaction barrel (2) are both provided with a feed inlet (16), the two feed inlets (16) are communicated with each other in the working process of the generator, and rubber plugs are plugged in the feed inlets; the lower end of the rotating shaft (12) is provided with an extrusion groove (17); the extrusion groove (17) is internally and slidably connected with an extrusion shaft (18); an air bag (19) is fixedly connected between the extrusion shaft (18) and the bottom of the extrusion groove (17); part of the surface of the rotating shaft (12) below the cover plate (14) is provided with uniformly arranged stirring tanks (3); the air bag (19) is communicated with the stirring tank (3); the stirring tank (3) is internally and slidably connected with a telescopic rod (31); the outer wall of the telescopic rod (31) is designed to be tightly attached to the stirring tank (3); the stirring tank (3) is designed into a right triangle, so that the inclined direction of the telescopic rod (31) faces to the rotating direction of the rotating shaft (12); the spring is fixedly connected between the telescopic rod (31) and the stirring tank (3), and the telescopic rod (31) can be pulled back into the stirring tank (3) through the spring in the process of loosening the air bag (19).
6. The modified polyurethane foam plastic as claimed in claim 5, wherein: an elastic belt (32) is fixedly connected between one end of the telescopic rod (31) far away from the rotating shaft (12) and the rotating shaft (12); the connecting point of the elastic belt (32) and the rotating shaft (12) is positioned above the connecting point of the corresponding telescopic rod (31) and the rotating shaft (12), namely the elastic belt (32) is positioned above the corresponding telescopic rod (31), so that the elastic belt (32), the rotating shaft (12) and the corresponding telescopic rod (31) form a right-angled triangle structure.
7. The modified polyurethane foam plastic as claimed in claim 5, wherein: the cover plate (14) is internally provided with sliding chutes (4) which are uniformly distributed; the sliding groove (4) is designed in a cross shape; a clamping rod (41) is connected in the sliding groove (4) in a sliding manner; one end of the clamping rod (41) penetrates into the penetrating hole (15), and the upper surface of one end of the clamping rod (41) in the penetrating hole (15) is inclined; the other end of the clamping rod (41) penetrates through the sliding groove (4); clamping grooves (42) which are uniformly distributed are formed in the surface of the trapezoidal groove (21); the clamping grooves (42) and the sliding grooves (4) are designed in a one-to-one correspondence mode, and one ends, close to the clamping grooves (42), of the clamping rods (41) penetrate into the clamping grooves (42) after the rotating shafts (12) penetrate into the penetrating holes (15); and a spring is fixedly connected between the clamping rod (41) and the sliding groove (4).
CN202010144892.8A 2020-03-04 2020-03-04 Modified polyurethane foamed plastic Withdrawn CN111234511A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112476931A (en) * 2020-10-30 2021-03-12 王蕊 Preparation process of modified polyurethane material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112476931A (en) * 2020-10-30 2021-03-12 王蕊 Preparation process of modified polyurethane material

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